Identify a potentially life-threatening arrhythmia.Help in diagnosis of structural changes of the heart.Help in diagnosis of adverse drug effects.Help in diagnosis of electrolyte disturbances.Help in diagnosis of the cause of the dyspnea.Help in diagnosis of the cause of the chest pain.ECG is an important tool used for support of diagnosis and treatment of various cardiac and other related diseases:īe the first indicator of ischemia and help in proper use of thrombolysis in treating ischemia. Its amplitude has a range of 0.1 mV-10 mV while its frequency falls into 0.01 Hz-250 Hz. The electrocardiogram (EKG or ECG) is a graph that records the electrical activity of the heart. Create heart or vessel images (e.g., CT, MRI, Ultrasonic) and.Measure blood properties (e.g., pressure, viscosity, contents and their percentage).
In addition, the cost for detecting and treating cardiovascular disease is very high, thus early diagnosis and prevention post a significant financial benefits as well. Early diagnosis and warning, therefore, are extremely important to uncover hidden or silent heart diseases and prevent sudden death. 1 Unlike many other diseases, some CVDs can cause sudden death, especially in people who physically appear heathy and fit.
Sensors have been playing key roles in all aspects of health care, especially Cardiovascular disease (CVD) -the disease that is the No.1 killer in the United States and the single leading disease that ended 17.3 million people’s lives worldwide in 2013. Keywords: biosignal conditioning, ECG, passive and active filters Introduction Testing of a real electrocardiogram from a human subject was performed on the designed BC circuit, which has indicated that the developed BC circuitry can preserve useful ECG information while removing unwanted noise and interference components. Data acquisition and sampling were performed using a USB6009 module with a built-in A/D converter. A power supply circuit provides a ±5V DC source for the system using two 9V batteries and two voltage regulators (NTE977 regulates +9V power supply to +5V NTE1917 regulates -9V supply to -5V).
A right leg drive circuit was added in order to cancel the common-mode signal between the left and right arm electrodes. The circuit consists of an instrument amplifier (AD8220), a 1st-order active high-pass filter (containing a MCP6271 op-amp and a RC filter in Sallen-Key configuration), a 5th-order active Bessel low-pass filter (consisting of a 1st-order LPF and two 2nd-order Sallen-Key filters), and a Twin-T active notch filter (combining two “T” shape RC filters with a MCP6271 op-amp). This paper describes how an ECG biosignal conditioning circuitry was designed, built, and tested. It also presents a great challenge due to the small amplitude of ECG raw signals and their ease of corruption with noise and other disturbances. ECG biosignal conditioning (BC) is critical because it directly affects measurement accuracy, reliability, and repeatability.
0 kommentar(er)
